WiMAX vs WLAN
This page on WiMAX vs WLAN/WiFi describes difference between WiMAX and WLAN/WiFi. Both wimax and wlan are mainly used for data communication. Wimax covers greater distance(about 50 km) compare to the WLAN(about 30 m).
WiMAX is short form of Worldwide Interoperability for Microwave Access.
WiMAX network consists of wimax base station and wimax subacriber stations.
The locations of base stations are decided based on RF link budget and other factors
similar to any GSM,CDMA cellular technologies. WiMAX devices are developed according to
the IEEE standards 802.16-2004(i.e. 802.16d, OFDM) and 802.16e-2005(i.e. 802.16e,OFDMA).
WiMAX supports data rate of about 70Mbps with higher modulation schemes such as QAM.
16d version of wimax is referred as fixed wimax and 16e version of wimax is referred as mobile wimax.
WLAN is short form of Wireless Local Area Network. It is mainly an extension to the normal
LAN(Local Area Network) with the advanced wireless devices. The wireless devices in WLAN network
is referred as WLAN routers and WLAN Access points or WLAN stations.
WLAN devices are developed according to IEEE 802.11 standards which include 11a,11b,11g,11n,11ac,11ad etc.
This different flavors of the 802.11 standards are evolving to take care of more data rates and bandwidth.
WLAN has become more pupular than WiMAX, due to less infrastructure cost and application of use. Unlike wimax,wlan is meant for smaller area of coverage and hence its application is limited to organizational premises/building,restaurants,hotels etc. Now-a-days each of this malls,cafes,restaurants provide wifi service so that visitors can make use of the internet facility with the use of the wifi hot spots also referred as wifi kiosks.
Major technical specification differences are mentioned below in the table.
|Bandwidth support||3.5MHz,7MHz for 16d(OFDM)
1.75/2.5/3/3.5/5/5.5/7/10MHz for 16e(OFDMA)
|20MHz for 11a,20MHz/40MHz for 11n|
|Frequency bands supported||2.5,3.5 and 5.8GHz supported||2.4 GHz and 5 GHz supported|
|Data rate||About 70Mbps in OFDM case||maximum supported data rate is 54Mbps in 11a|
|subcarrier spacing||90KHz for OFDM and 11.16KHz for OFDMA||312.5 kHz|
|Cyclic Prefix||1/4,1/8,1/16,1/32||same as WiMAX|
|IFFT point||256 point FFT for OFDM,
128/512/1024/2048 point FFT for OFDMA
|64 point FFT including 48 data and 4 pilot carriers,rest guard carriers and 1 DC|
|MIMO support||Mobile wimax(OFDMA) support MIMO||11n version support MIMO|
WiMAX WLAN RELATED LINKS
What is Difference between
difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
Difference between TDD and FDD
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n
OFDM vs OFDMA
CDMA vs GSM